Leather skiving machine



(Model.)

LEATHER SKIVING MACHINE.

No. 264,87@ l Patented sept. 26; 1882.

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UNITED STATES' PATENT Genion, y

ERASTUS GOTT, OF` NEWTON, MASSAOIIUSETIS.`

LEATHER-sKlvlNe MACHINE.

SPECIFICATION forming' part of Letters `Patent No. 264,874, dated September 26 1882.

Application filed May 10, 1880. Renewed August 18, 1882. (Model.)

To all whom it may concern Be it known that I, ERASTUS GOTT, a citizen of the United States, residing at Newton, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Leather Skiving Machines; and I do hereby declare the following to he a full, clear, and exact description ofthe invention, such as will enable others `skilled in the artto which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form apart of this specification.

This invention relates to leatherskiving machines which are provided with a feedwheel, a spring forcing the leather against said wheel, and a device or devices for adjusting the positioii of the striving-knife. The said invention consists in certain improvements in the construction and combination ofthe aforesaid parts, as will be hereinafter set forth.

The drawings accompanying this specification represent in Figure l an isometric elevation of a machine for skiving leather which embodies my invention, while Fig. 2 is a vertical cross-section, and Fig. 3 a vertical and longitudinal section, of the same.

Reference being had to the drawings, it will be seen that A represen ts the frame of the machine, which in this instance is represented as a flat tablet or bed-plate, B, erected upon legs C C, Ste., and formed at its front end with a longitudinal opening, D, to receive the feed wheel, which is shown atE. This feed-wheel is acircular flat disk secured to a horizontal shaft, F, mounted in bearings G G, and disposed transversely of the tablet B, such shaft being provided at one end with the usual pulley, H, by which itis put in motion, and the periphery of the Wheel, which is practically flat, being toothed or abraded in any suitable manner in order to exert sufficient drag upon the leather to feed the latter under the action of the knife.

rlhe knife is shown at I as a flat blade in the form of a chisel, secured within a stock, J, by a clamp-screw, K, and so disposed with respect to the periphery of the feed-wheel that its edge shall preferably stand slightly in rear of the highest point of such periphery-that is, of a vertical line drawn through the axis of the wheel-while the longest plane of the knife stands generally at a tangent of an acute angle to the periphery of said wheel.

The knifestock J in this instance is attached to a curved bar, L, whose upper end is formed into a grooved or socketed head, N, to receive the knife, while the body of the stock is practically an arc of a circle, and is supported upon an abutment, `0, erected upon the tablet B or one of the journalboxes of the shaft F, and so disposed transversely ot' the periphery of the feed-wheel that theslope or angle ofthe cutting-edge ofthe knife with respect to the said periphery may be varied to determine thel length of the scarf cut by such knife, as occasion may require. It may be desirable or necessary to provide for movement or adjustment between the knife and the bar, and, in fact, I have thus presented it in the 4accompanying drawings, in order to vary the height of the knife-edge with respect to the feed-surface of the wheel-that is to say, the knife-stock is represented as a separate piece from the bar and secured to the latter by a setscrew or bolt, a. r

P in the drawings represents a plate-spring secured at its base to a standard or post, q, erected upon the tablet B, either in rear or to one side of the feedwl1eel, the free end b of this spring resting upon or immediately over the pcriphery of the feed-wheel, and being disposed to one side of the knife until it passes in front ofthe latter, when it widens into a head, c, of a width greater than that of the periphery of the wheel.

The head c of the spring P preferably slopes to an edge in Afront of that of knife, and the two are situated closely together, in order that the pressure of the spring upon the leather fed by the wheel shall be brought as closely as pos` sible to the knife-edge to enhance the effective action of the feed and prevent any tendency to doubling of the leather at this point.

'lhe portieri d of the head of the spring P, which extends in front of the knife, may be independent ofthe body of the spring and secured to the latter by a set-screw, in order that the width of the throat in front of the knife may be varied; but as this adjustment is effected by the knife itself, the latter construction would be unnecessary.

IOO

The spring I is adapted to bear upon orrest l for insuring contact of the leather and feed I immediately over the peripheryof the feedwheel at two points-one in advance of and the other in rear of the cutting-edge of the knifethe former serving to seize and introduce the edge ofthe leatherbetween the spring and wheel and to preserve and present the leather in a smooth condition, free from wrinkles, to the knife, while the bearing serves to draw the leather between the wheel and knife.

In lieu of a single spring executing the dual function, as explained, two springs may be employed, ol'eqnal or different powers; or the portion of the spring in advance of the knife may be independent of the body and secured to it by any suitable means; but I have found the single spring, as herein shown, to operate successfully. 'i

The gage toguide the edge of the leather in its due relation to the knife is shown at e sim-- ply as a lip depending from the under side of the front end of the spring I. and to one side am enabled to exert a pressure upon the former as closely to the knife-edge as may be desired.

The machine, heilig durable and effective, can be manufactured at comparatively small cost.

I claim- 1. In combination with feeding-wheel E and a skiving-knil'e, the curved bar Q and the spring P, supported thereby, said spring being recessed on one side to allow the action of said knife, substantially as shown.

2. In combination with a feed-wheel and a pressure-spring, the curved bars L and N, which support the skiving-knife, one of said bars being arranged to slide over the other, so as to give said knife a curvilinear adjustmen t, substantially as set forth.

3. The combination of knife-stock J, screw I 

